ON  THE  PEAK  OF  TENEEIFPE, 
533 
Date. 
Time. 
Mean  time, 
Santa  Cruz. 
Low-water 
depth. 
High-water 
height. 
Moon’s  meri- 
dian transit, 
South  and 
North. 
Luni-tidal 
interval. 
1856. 
h m 
ft. 
inches. 
ft. 
inches. 
h 
m 
m 
October  12. 
17  27 
3 
6-12? 
23  42 
4 
5*00 
23 
23 
-19 
13. 
5 52 
3 
11*75 
12  3 
3 
10*75 
11 
49 
-14 
18  3 
3 
10-25 
14. 
0 23 
4 
6*25 
0 
16 
- 7 
6 28 
3 
11*00 
12  46 
3 
11*75 
12 
43 
- 3 
18  51 
3 
9*50 
15. 
1 9 
4 
3*75 
1 
11 
+ 2 
7 14 
3 
7*00 
13  34 
3 
8*87 
13 
40 
+ 6 
19  30 
3 
7*50 
16. 
1 45 
3 
8*00 
2 
10 
+ 25 
8 0 
3 
2-87 
Projections  of  the  above  tides  indicate  8 feet  3‘25  inches  as  the  amoimt,  and  thirteen 
days  twenty-two  hours  as  the  epoch  of  extreme  rise  and  fall,  or  12’“  4“  after  the  instant 
of  full  moon.  The  minutes  thus  given,  and  to  some  extent  the  hom’s  also,  must  be 
taken  only  as  an  accidental  result  of  the  numbers  employed,  but  come  curiously  close 
to  the  intervals  between  the  times  of  high  water  and  the  moon’s  transits  as  given  in  the 
last  column  of  the  above  Table,  where  the  mean  of  the  whole  comes  to  1 minute,  or  with 
12  hom’s  added,  to  12*“  1“. 
These  numbers,  on  being  compared  with  the  only  published  statement  I have  been 
able  to  meet  with  of  the  tide  at  Teneriffe,  appear,  by  their  difference  therefrom,  to 
justify  some  further  inquiry  into  them  for  scientific  pui’poses,  at  the  same  time  that 
their  differences  inter  se,  at  first  looking  anomalous,  but  soon  proving  to  be  correct,  as 
shown  particularly  in  the  semidiirrnal  differences  of  the  high  waters,  indicate  the  accuracy 
of  Don  Fkaxcisco  Aguilae’s  observations. 
A barometer,  kindly  lent  by  Admiral  Fitzeoy,  was  observed  by  Mr.  Hamilton  of 
Santa  Cruz  during  the  above  observations,  and  -within  half  a mile  of  the  place  where 
they  were  made.  The  differences  were  so  small,  that  no  attempt  has  been  made  to 
correct  the  height  of  the  tide  for  them.  At  3 p.m.  and  9 p.m.,  the  maximum  and  mini- 
mum nearly  of  the  atmospheric  wave,  the  readings  were  thus : — 
3 P.M. 
9 P.M. 
October  13. 
14. 
15. 
16. 
inches. 
30*21 
30-20 
30-22 
30-20 
inches. 
30-23 
30-23 
30-23 
30-23 
